To answer your questions directly, "cum" is a slang term, and it can mean two things: it can mean "coming to climax" (referring to both male & female orgasm--although spelled this way it usually refers to males only), or it can mean "semen". Sperm are contained in the semen. You cannot see sperm with the naked eye, and they do not change the appearance of semen.

"Ejaculated" means just what it says. Semen, containing sperm, has been ejaculated from a penis.

Let's clear up the myths and misinformation here. "Pre-cum" comes from a set of glands near the base of the penis, and are not connected with the other glands that produce/supply sperm-containing semen. Pre-cum, in and of itself, cannot get you pregnant. HOWEVER, the following scenario has a chance of getting you pregnant. Let's say that the guy has ejaculated recently (within the last few hours) and has not urinated since then. He begins having sex, and some pre-cum is released. Since he MAY have traces of sperm-containing semen left in his penis, this could make its way out with the pre-cum (or even by itself if there is no pre-cum released) and enter into the vagina. So, even if you plan on using the "pull out" method, which I DO NOT recommend, a guy could already have introduced semen into his girl's vagina--unrelated to his impending ejaculation--and get his girl pregnant. The odds of her getting pregnant are not as great as if he ejaculated directly into her vagina, but is possible and has been documented.

To go a little further: Guys don't produce "tiny bits of cum" while having sex. If anything leaks out at all, it'll be pre-cum. The nervous system has to cause a seminal emission (phase one of an ejaculation)--where semen, containing sperm, is released into the urethra. At this moment, even before the expulsion phase takes place (phase two of an ejaculation, where semen squirts out of a penis), which should normally follow in a few seconds, some semen CAN leak out of the penis. THIS IS WHAT MAKES "PULLING OUT" RISKY. Please use a condom EVERY TIME! :)

Cum ( or Pre Cum ) is a sort of lubrication that slowly is pumped through the penis. Like women..it is also clear. Sperm is the White sticky substance that comes after male orgasm and the sexual climax. Don't assume that pre cum can't get a female pregnant cause it is possible.

Cum is actually used interchangeably as both a noun and a verb. As a noun, "cum" is slang for a man's ejaculate - or semen (ejaculate also being both a noun and a verb. Ejaculate being the fluid that comes out of the penis during orgasm. Ejaculate also being the action of what takes place during orgasm). Cum is also a verb, an action word used to describe orgasm (i.e. "I'm gonna cum!"). Men and women both use the word "cum" when approaching, nearing, or having an orgasm.

Sperm is the microscopic component of semen, cum, or ejaculate that causes pregnancy. In about 5ml (one teaspoon) of cum there are about 100-300 million sperm produced! Yep. A whole lotta sperm. There are reasons why men have to produce so much sperm with each ejaculate but that's a long story. Just know that it only takes one of those sperm cells to fertilize an egg.

Semen gives sperm the nourishment it needs to be able to travel its long journey to the egg. Without the energy provided by semen to the sperm, the sperm would die off pretty fast after ejaculation.

cum,sperm,semen,it's all the same and it'll all get you a kid, and for the record,there's this stuff called precum or jiz and that will still get you a kid on the way even though its clear and thin instead of thick and white, if it gets anywhere near the vag opening, you can get knocked up! google and be careful!

Sperm are the cells that contain his DNA. The little fishy ones. If comes out as a white substance at the moment or orgasm. People call it cum, jiz, and lots of other things.

Sometimes he can produce tiny bits of cum while he is having sex. It leaks out and acts as a lubricant. This can contain sperm and is why people who use the withdrawal (pull out) method have LOTS of kids. ALWAYS USE A CONDOM AS SOON AS HE GETS NAKED!!! People sometimes call this precum.

Ejaculation is basically the proper word for when a boy has an orgasm or cums. Sperm is actually known as the ejaculate in medical terms.

Yes you are a girl but why isn't your school teaching you this? If you aren't getting sex education then you might want to google it online and get some for yourself.